Your lenses wishlist for 2011 - RESULTS

[lol]

There may be such a point, but I don't think we're at it yet. The Sigma 50-150 (the current model, without OS) weighs about 780 grams. The 70-200 f/2.8 non-IS weighs 1310 grams. The crop-apropriate range (50-150 mm) affords big savings, IMO.

The weight "saving" going down to the 150mm lens I believe is mostly down to the shorter focal length, moreso than any further saving from being a crop sensor design.

Also, if you're going to start comparing crop sensor + lens vs full frame sensor + other lens, you might also want to start considering aperture equivalence too...

 

[match14]

EF-S 30mm 1.4 to rival the Sigma 30mm. Iknow the Sigma is good but it would be interesting to see what Canon could do.